Fe<SUB>3</SUB>Cr規則格子合金の高温および常温の磁化および磁歪におよぼす恒温磁場中焼鈍の効果について

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  • On the Effect of Isothermal Magnetic Annealing on the Magnetization and Magnetostriction at High and Room Temperatures in a Fe<SUB>3</SUB>Cr Superlattice Alloy
  • Fe3Cr規則格子合金の高温および常温の磁化および磁歪におよぼす恒温磁場中焼鈍の効果について
  • Fe3Cr キソク ゴウシ ゴウキン ノ コウオン オヨビ ジョウオン ノ ジカ オヨビ ジワイ ニ オヨボス コウオン ジバ チュウ ショウドン ノ コウカ ニ ツイテ

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The magnetization and magnetostriction at high temperatures in a Fe3Cr alloy thermally demagnetized were measured simultaneously and their time changes at constant temperatures under external fields of 71.3 Oe and 285 Oe have been continuously traced from the instant of the application of a field. Then, the magnetization and magnetostriction at room temperature were measured after the isothermal magnetic annealing, which was continued till the time changes were completed. The amount of the time change of magnetization and magnetostriction at high temperatures becomes larger as the duration of the application of the field is prolonged and the strength of applied field is raised. The effect of isothermal magnetic annealing begins to appear at about 400° and increases with a rise of temperature, till the effect reaches its maximum at about 530°. Then, it decreases rapidly and becomes very small in the temperature range higher than the transformation temperature of Fe3Cr superlattice. With progress of the annealing, the positive magnetostriction becomes smaller and even changes to a negative one in the case of the magnetic annealing for 150 hours under the external field of 285 Oe in the temperature range from 500° to 540°, showing that there is an anisotropy of magnetostriction in Fe3Cr alloy. The effect of the isothermal magnetic annealing on the magnetization and magnetostriction at room temperature in Fe3Cr alloy are almost similar to that at high temperatures, excepting that the maximum permeability is larger when the alloy was annealed under the external field of 71.3 Oe, than in the case of the annealing under the field of 285 Oe. According to these results, it can be concluded that the relaxation of the magnetization and magnetostriction is caused by a micro-creep or a phenomenon similar to it, due to magnetostriction at high temperatures, and that the superlattice transformation plays an important part in the progress of the effect.

収録刊行物

  • 日本金属学会誌

    日本金属学会誌 24 (7), 465-469, 1960

    公益社団法人 日本金属学会

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